Agreed. I personally work well in an open office. Half way through the article, or really it was just citing other peoples research with no other analysis, I got mad.
It just comes back to -- if you want to prove a point there will be data out there to help you justify it. This article is trying to pretend to be objective, but really is just citing a slew of studies that, presumably, had really small sample sizes. /rant
There is no one answer. IMO an ideal office would have both options.